Help me to choose a video card for my comuter

[x001x]

I was wondering to buy a graphic card for my computer.
I have: Intel Core I3 540 3.07, 3.06 (2 Core) and 4 threads. (1) 2gb ddr3 1333 and (1)4GB DDR3 1333 ram, 1TB Hard drive.
I have looked at few graphic card, but no sure which I should I buy
GEFORCE GT430 2GB DDR3 128BIT,
AMD Radeon HD 6570 2 gb GDDR3,
Sapphire HD 5450 2GB DDR3
which should i buy?

 

[Deemo13]

What's your budget?

 

[x001x]

i dont know yet but from the 3 choices aboce which would be better for gaming?

 

[Deemo13]

Well, to be honest, none of them really. It depends on the games you are trying to play. None of those will play BF3.

What games are you trying to play?